I thought I wanted something, and had to use Usenet to get it. It turned out that it wasn't the case anymore. So while being in first day of the trial period, I tried to cancel via e-mail and tickets. Grated, that was on a Saturday, so it may have something to do with the fact the on Monday my subscription was still active.
But, after trying again to cancel, this time with a phone call, it was a breeze. The call lasted about 2 minutes, with wait time included, and the subscription was canceled.